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AliExpress runs silent WebAudio fingerprinting that breaks Bluetooth multipoint
(blog.laserphile.com)
this post was submitted on 20 Aug 2026
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Technology
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Honestly, this doesn't sound like spyware. More like absurd optimization. Here's why: Audio devices often go to sleep (to save battery) and can take a second or two to wake up. That's enough time that the end user will miss the first second or two of audio.
By keeping the audio outputting something (even if it's just silence), they can guarantee that their little (often hilariously terrible) product videos will play the way they expect (which is loud and startling, of course!).
This is just one of those stupid tricks that's bad for energy use but good for ignorant users who might complain that the first second of every AliExpress video is silent 🤷
The reason why I believe this to be the case is because there's really nothing unique or interesting to be learned from an audio output loop that's literally sending zeros through itself. If you wanted to use that to fingerprint a user, you wouldn't need to keep it active. You could pass a single zero (silence) through and be done.
The gaining happens after retrieval of the results it seems: so it's just silent for the end user. And perhaps they do both fingerprinting, and ensure audio devices remain awake.